Mark 13:28-31

Now learn a parable of the fig tree; When her branch is yet tender, and putteth forth leaves, ye know that summer is near: so ye in like manner, when ye shall see these things come to pass, know that it is nigh, even at the doors. Verily I say unto you, that this generation shall not pass, till all these things be done. Heaven and earth shall pass away: but my words shall not pass away.